Ordobrevia foveicollis (Schönfeldt, 1888), Schonfeldt, 1888

Hayashi, Masakazu, Kamite, Yuuki, Kobayashi, Takuya & Sota, Teiji, 2016, Description of larvae of genera Stenelmis, Ordobrevia and Nomuraelmis (Coleoptera: Elmidae: Elminae) of Japan with their molecular taxonomy, Zootaxa 4178 (4), pp. 451-480 : 470

Ordobrevia foveicollis (Schönfeldt, 1888)

( Figs 3 K–M, 13)

Materials examined. JAPAN: Shimane Prefecture: 1 ex. (dried) and 3 exs. (dried with an ultrathin coating of gold), Kouji-gawa (river), Kouji , Okinoshima-chô , Dôgo , Oki Islands , 14.vii.2014, MH leg.; 1 ex. (in 70% ethanol), Yoshino-gawa (river), Sada-chô, Izumo-shi , 2.viii.2008, MH leg.; 1 ex. (in 70% ethanol), Hii-kawa (river), Agu, Hikawa-chô, Izumo-shi, 22.viii.2007, MH leg.; 1 ex. (in 70% ethanol), Kando-gawa (river), Kamiottachi, Sada-chô, Izumo-shi, 21.viii.2007, MH leg.

Description. Body elongate, gradually narrowing from middle to apex; convex dorsally and flattened ventrally; slightly prominent spiracles on mesothorax and abdominal segments I–VIII. Body color entirely yellowish brown or orange, and appendages yellowish brown. Dorsal surface not smooth with dense minute granules and setae.

Head visible from above, well exposed from prothorax; as wide as long; clypeus transverse, with setae on front; a pair of spines on both sides of clypeus; vertex with minute granules and brush-like setae.

Thorax not serrated on sides; dorsal surface entirely not smooth with granules and dendritic setae. Prothorax longer than width, 2.5 times as long as mesothorax; with three ventral sclerites, procoxae closed posteriorly; scalelike setae on hind margins. Meso- and metathorax transverse; metathorax longer than mesothorax. Mesothorax with five ventral sclerites.

Abdomen 9-segmented. Segments I–VIII transverse, dorsum entirely not smooth with dendritic setae, ventral surface smooth and shiny with setae sparsely; pleural sclerites on segments I–VII; tergal sutures on dorso-lateral area indistinct. Last segment (segment IX) longer than wide, robust in base, narrowing to apex without longitudinal ridge; dorsal surface not smooth with minute spines and dendritic setae; ventral surface smooth and shiny; apex with a pair of spines; ventral operculum, opercular claws, and anal gills present.

Habitat. Middle to lower stream reaches; larvae live in the gravel substrate.

Identification. The larva was identified by mitochondrial DNA sequences ( Hayashi & Sota 2010).

Distribution. Hokkaido, Honshu, Shikoku, Kyushu, Oki Is (Dogo Is.).

Bibliography. Hayashi & Sota (2010: fig. 3).

Figures

FIGURE 3. Larvae of Stenelmis and Ordobrevia of Japan. A – C, S. aritai M. Satô; D – F, S. hayashii M. Satô; G – H, O. gotoi Nomura; I – J, O. maculata (Nomura); K – M, O. foveicollis (Schönfeldt). A, D, G, I, K, dorsal view; B, E, H, J, L, lateral view; C, F, M, ventral view. Scale bars: 1.0 mm.